1309396426 has 8 divisors (see below), whose sum is σ = 2115178884. Its totient is φ = 604336800.

The previous prime is 1309396373. The next prime is 1309396447. The reversal of 1309396426 is 6246939031.

It can be written as a sum of positive squares in 2 ways, for example, as 989165401 + 320231025 = 31451^2 + 17895^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25180675 + ... + 25180726.

Almost surely, 2^1309396426 is an apocalyptic number.

1309396426 is a deficient number, since it is larger than the sum of its proper divisors (805782458).

1309396426 is a wasteful number, since it uses less digits than its factorization.

1309396426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50361416.

The product of its (nonzero) digits is 209952, while the sum is 43.

The square root of 1309396426 is about 36185.5831236696. The cubic root of 1309396426 is about 1094.0161094609.

The spelling of 1309396426 in words is "one billion, three hundred nine million, three hundred ninety-six thousand, four hundred twenty-six".